@DebW, also, my front derailleur has a bottom mount cable, so unlike the photos in my Parks Big Blue Book volume 2, I can't really grab the cable and pull - at least not in any obvious way.
Unless you have continuous housing all the way, you can grab the cable along the downtube. Just pull it away from the downtube - the derailleur should move. (However, once when I did this at the co-op, the patron's brifter slipped instead.)